First things first. The graphics card is on 'this week only' at Overclockers.co.uk with quite a bit knocked off. Grab it now if you can, as it's applicable to all the options I've come up with.
I've got things together in an Excel spreadsheet
here. If you don't have Excel you can get an Excel Viewer from
Microsoft.
There are 3 options (in the sheet tabs along the bottom). One AMD-based self build, one Intel-based self build and one Dell pre-built which you'll have to add a graphics card to. Each component in the spreadsheet has a link taking you to that part. Black links are for Scan.co.uk (other than on the Dell sheet, which links to the Dell system). Blue links are for Overclockers.co.uk (the graphics card is stupidly cheap at the moment) and red links are options which can make systems cheaper, though I can't recommend them.
The theory is, building yourself will be of higher quality than buying a pre-built, and you know exactly what's going in it. For instance, I can't guarantee that the graphics card will fit in the Dell system, or that the PSU it has will be sufficient to power it (it should be though). The PSU likely won't have the necessary 6-pin power cable for the graphics card either, so I've added a 2xmolex to 6-pin adapter, so include that when ordering the graphics card if you're getting the Dell system. If you're making your own, the PSUs will have the 6-pin power socket.
If going for the Dell, pick the cheapest Inspiron (£269 at the moment), then go to Customise and change the CPU to the Pentium Dual-Core E2180 and up the RAM to 2GB, which should give you a price of £309 including VAT and delivery at the moment.
There are 3 monitor options, all widescreen. The 19" and 22" I've no experience of, but it's fair to say they'll be fairly cheap and nasty affairs. The 20" is of much higher quality (and the same resolution as the 22"
, though you do pay more for it. The Dell monitor will include a DVI cable, but many don't include one, so if you go for either the 19" or the 22", add the DVI cable to the order too.
Of the 2 self-builds, I'd personally go for the AMD one, just because I know the motherboard. There's no difference between those 2 systems all considered though. I also know the case and PSU, and can highly recommend one or both of the 2 hard drives (they're bloody quick!). DVD drive is fine too. I've specced XP Home (unless you're on a domain, Pro is pointless), just as that's probably what you're used too, though there are options for Vista Home Premium too. The 64-bit one can be a bit more problematic for some older software, so the safe option is the 32-bit one. 64-bit will become the norm, and is recommended, but that's up to you depending on how safe you want things and how little you want to troubleshoot. If you do go 64-bit Vista though, grab the 4GB of RAM option too.
If you go for the Dell, set it up, switch it on and fill in the stuff (your name and things) when asked. Let it do its things, then uninstall the Intel graphics drivers, switch it off, then add the graphics card, if there's no free 6-pin power lead, find 2 available 4-pin molex plugs and plug them into the adapter and the adapter into the card, plug plug the monitor cable into it, and switch it on, installing the
latest drivers (not the ones on the CD) when it comes back up.
As expected, I can't quite get it to the £450 top budget (when adding a monitor) if you're playing games, and I can't find anywhere that will after a quick look.
Your other option is that company you spied last night, but replace the PSU with one I specced and you'll need to add the graphics card. Personally, I wouldn't touch with a barge-pole, but it's your choice.
Feel free to ask anything or if you want one of those builds amending in anyway.